Drawing press



Sept. 18, 1923. 1,468,304 v w. KLOCKE DRAWING PRESS Filed June 15. 19202 Sheets-Sheet 1 Sept. 18, 1923.

W. KLOCKE DRAWING PRESS wumtoz Patented Sept. 18, 1923.

UNITED STATES PATENT OFFICE.

WILLIAM KLOCZE, OF NEW YORK, N. Y., ASSIGNOR TO E. W. BLISS COMPANY, 01'

nzaooxmm, NEW YORK,

A CORPORATION OF WEST VIRGINIA.

DRAWING PRESS.

Application filed June 5,

To all whom it may concern:

Be it known that I WILLIAM KIDCKE, a citizen of the United States ofAmerica, residing in New York city, borough of Queens, in the county ofQueens and State of New York, have invented certain new and usefulImprovements in Drawing Presses, of which the following is aspecification.

This invention relates to improvements in drawing presses, and aims toprovide improvements therein.

The invention provides a novel blankholder or die-carrying slideoperating mechanism, of simple, durable and eflicient construction, andwell adapted to transmit symmetrical pressure to such a slide.

The invention further provides a construction wherein the arts of theblankholder or die-carrying s ide operating mechanism may be arranged inclose proximitv on the frame of the press, and also preferably in closeassociation and proximity to the punch slide operating mec anism.

The invention further comprises a novel combination, andsub-combinations, hereinafter more fully set forth, of partsconstituting a drawing press.

Two embodiments of the invention are illustrated in the accompanyingdrawings.

In said drawings, Figure 1 is a front or rear view, in elevation, of adrawing press according to one embodiment of the invention.

Figure 2 is a side view of the press shown in Figure 1.

Figure 3 is a view similar to Figure 1, of a second embodiment of theinvention.

Figure 4 is a view, in side elevation, of the parts shown in Figure 3.

Referring to said drawings, numeral 1 designates a slide adapted toreciprocate to and from a bed 3, one of these parts being adapted tocarry a blank-holder and the otherpart being adapted to carry a die.Numeral 5 designates a punch slide, which may work either toward the bedor the blank-holder, depending upon the position of the die, but, ashere shown, is referably arranged to work through the sli e 1.

The slide 1 convenientl reciprocates upon slideways or gibs 7, on t e sie pieces 9 of the press frame, these side pieces being convenientlyconnected by an overhead intermediate piece 10.

5 Numeral designates the mechanism for 1920. Serial No. 388,839.

operating the punch slide and numeral 17 designates the means foroperating the blank holder slide.

The means for operating the punch slide conveniently comprises a crankshaft 18, connected to the slide 5 through suitable connecting rods 19,and the crank shaft 18 preferably extends through the side pieces 9 ofthe press frame, and conveniently has, on its outer end or ends, rotarydriving part, as, for exam 1e, a wheel or gear 20. In the case of widpresses or heav duty presses, it is preferable to provide driving parts20 at each end of the crank shaft 18.

The blank-holder slide operating mechanism 17 conveniently comprises arocking part or parts 22, conveniently in the form of rock shaft 23, andin wide presses, or heavy duty presses, these rocking parts, or the rockshaft 23, are preferabl arranged on two sides of a mid-plane o thepress, in such manner as to transmit a symmetrical pressure to four ormore points of connection to the blank holder slide 1. The connectionbetween the rocking parts or rock shafts and blank holder slide areconveniently in the form of toggles 25.

The rocking parts or rock shaft or shafts are preferably connected to aslide 27 which slide is conveniently operated by a lever 30 fulcrumedupon the frame of the press, turning through a relatively short arc, forexample, and having a link connection 31, Figures 1 and 2, or 31,Figures 3 and 4, with said slide,'and also conveniently havin a link 35connected to a reciprocatory driving part, which driving part ispreferably an eccentric part or pin 37, upon the drivin part or gear 20on the crank shaft 18 (w ich crank shaft operates the punch slide In theembodiment of the Figures 1 and 2, the slide 27 is mounted upon theintermediate portion 10 of the frame, and preferabl in the mid-plane ofthe press. The rocking parts 22, in this embodiment, are mostconveniently in the form of a rock shaft or shafts 23, symmetricalldisposed with relation to the slide 27, an the slide is convenientlconnected to an arm or arms '40 on the roc shaft through a link 41, the

slide being thus connected to the rock shaft intermediate the endsthereof, and the connections with the slide 1. This arrangementeliminates considerable torsion in the rock shafts, and also provides auniform torsion between the point of application of the driving force tothe rock shaft and the points of connection of the rock shaft to theblank holder slide 1.

The lever 30 is preferably arranged substantially parallel to the blankholder or horizontal plane of the press, and conveniently extends to apoint above the upper face of the driving part or gear 20, thusproviding for a transmission of the driving force from the outer side ofthe driving part or gear 20 over its periphery to the parts of the blankholder operating mechanism on the press frame. Ball and socketconnections 44, 45, are preferably provided between the link 35 and thelever 30, and the link 35 and the eccentric part or pin 37, in order toallow for the turning of the link 35 in two planes,

The arrangement of the actuating slide 27 is preferably such that thelink 41 is substantially at right angles with the line of the toggles25, when the said toggles are extended, and the arrangement furthermoreis such that, with the parts in the position just described, theeccentric part is passing through the angular positions of its movementin the vicinity of 270 degrees.

In Figures 3 and 4, the slide 27 is arranged upon the side piece 9 ofthe frame, preferably between or in a plane between the driving part orgear 20 and the said side piece 9, the side piece being provided withgibs 50 for the slide 27, and the slide being conveniently cut out orslotted in its portion which is in line with the crank shaft, asindicated at 52.

The lever 30 is preferably connected to its drivin part, which ispreferably the gear or driving part 20, in the same manner as the lever30 in Figures 1 and 2, viz, through a link 35 connected to an eccentricpin or part 37 along the outer side of the said driving part 20. Balland socket joints 44, 45 at the ends of the lever 35 are also provided.

The rocking parts or rock shaft or shafts 22, 23 are preferablyconnected at an end orends to the slide 27, the rock shaft or shafts 23,for example, conveniently extending beyond the side frame 9 of the pressand being connected to the slide through an arm 54 and a link 55,pivoted on the slide 27. In the case of wideor heavy duty presses, therocking parts at each side of the press, or the two ends of a rockshaft, may be each driven by a slide 27 and operating mechanism similarto that shown in the present embodiment, viz, the embodiment illustratedin Figures 3 and 4. In li ht duty presses, the rock shaft or shafts 2%may be driven from one end onl without objectionable torsions or strainslieing developed.

The inventive ideas herein set forth may receive other embodiment thanthose herein specifically illustrated and described.

WVhat is claimed is:-

1. A drawing press comprising a frame, a blank holder or die carryingslide, and means for reciprocating said slide with a dwell in itsmovement, said means comprising a shaft extending beyond said frame, awheel and an eccentric part on said shaft beyond said frame, a leverhaving a relatively short angular movement and fulcrumed on said frame,and a link connected at its ends to said lever and to said eccentricpart.

2. A drawing press comprising a frame, a blank holder or die carryingslide, and means for reciprocating said slide with a dwell in itsmovement, said means comprising a shaft extending beyond said frame, awheel and an eccentric part on said shaft beyond said frame, a leverhaving a relatively short angular movement and fulcrumed on said frame,an actuating slide, a link connected at its ends to said lever and tosaid slide, and a link connected at its ends to said lever and to saideccentric part.

3. A drawing press comprising a frame, a blank holder or die carryingslide, and means for reciprocating said slide with a dwell in itsmovement, said means comprising a shaft extending beyond said frame, awheel and an eccentric part on said shaft beyond said frame, a leverhaving a relatively short angular movement and fulcrumed on said frame,an actuating slide, a link connected at its ends to said lever and tosaid slide, and a link connected at its ends to said lever and to saideccentric part, said actuating slide being mounted on said frame at aheight above the lower part of said wheel, whereby the lower outer partof said frame may be free of moving parts.

4. A drawing press comprising a frame, a blank holder or die carryingslide, and means for reciprocating said slide with a dwell in itsmovement, said means comprising a shaft extending beyond said frame, awheel and an eccentric part on said shaft beyond said frame, a leverhavin a relatively short angular movement and fu crumed on said frame,an actuating slide. rocking parts having toggle connected at its ends tosaid blank holder slide, a link connecting said actuating slide androcking parts, a link connected at its ends to said lever and to saidslide, and a link connected at itsends to said lever and to saideccentric part.

5. A drawing press comprising a frame, a blank holder or die carryingslide, and means for reciprocating said slide with a dwell in itsmovement, said means comprismg a shaft extending beyond said frame,

tively short an crumed on said rame, an actuating slide, a

link connected at its ends to said lever and to said slide, and a linkconnected at its ends to said lever and to said eccentric part, saidactuating slide being mounted upon the mid-frame of the press.

6. A drawing press comprising a frame, a blank holder or die carryingslide, and means for reciprocating said slide with a dwell in itsmovement, said means comprising a shaft extending beyond said frame, awheel and an eccentric part on said shaft beyond said frame, a leverhaving a relatively short angular movement and fulcrumed on said frame,an actuating slide, rocking parts having toggle connected at its ends tosaid blank holder slide, a link connecting said actuatin slide androcking parts, a link connected at its end to said lever and slide, anda link connected at its ends to said lever and said ecoentric part, saidrocking parts being on each side of the mid-plane of said frame.

In witness whereof, I have hereunto signed my name.

WILLIAM KLOCK E.

Certificate of Correction.

It is hereby certified that in Letters Patent N4 1,468,304, grantedSeptember 18. 1923; upon the a plication of William Klocke, of New York,N. Y., for an improvement in rawing Presses, errors appear in theprinted specification requiring correction as follows: Pa e 2, lines 119and 120, claim 4, strike out the words connected at its ends an insertinstead the word ean-nections, and line 121, strike out the wordconnecting and insert the words connected at its ends to; page 3 line19, claim 6, beginning with'the word"conneeted strike out all to and icluding the word part, line 24, and insert the words connections to midblank holder slide, a link connected at its ends to said actuating slideand rocking parts, a link connected at its ends to said lever and tosaid slide, and a link connected at its ends to said lever and to saideccentric part; and that the said Letters Patent, should be read withthese corrections therein that the same may l-onform to the record ofthe case in the Patent Ofiice.

Signed and sealed this 23d day of October, A. D., 1923.

[emu] WM. A. KINNAN,

Acting Commissioner of Patents.

